Hi,
I agree with 419. Virgin Gold is worth having for lounge access ( and Revivals when returning to LHR),priority boarding and Upper class check in ( and security fast track at LHR/LGW).
My first operational upgrade was whilst I was silver ( returning from SFO and was omved up from Premium Economy to Upper Class)- I normally travel Upper class now in any event so do not worry about op-ups.
Regards
TBS